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Ecu dead?


mcbride89
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Galant VR-4 org Post #: 1137481 posted 08/22/13 08:08 PM     Remind Me!  Send Private Message   Edit Post      
Got the car back together after changing up some things. I had pulled the ecu to inspect during this as well, had a burnt IC105 driver which explained my irraddic idle. Now with the ecu plugged in. I get no check engine light leadin me to believe that the ecu isn't getting power.

I checked the MPI relay on pins 10&8 and 9&7 and that checked out good. MPI fuse is good. On the pin 103 for constant backup power I have 12volt. But no where else. I just get a click from the relay when I go to turn her on. Am I missing something? I've been getting friendly with my multimeter so please tell me other things to check. Could my ecu have just shit the bed from being pulled for so long?

Ant



1991 125/2000

Posts: 133 | From: Belmar,NJ | Member Since: 12/17/12 | IP: (174.44.162.208) | Report this post to a Moderator

transparentdsm
I have to say something dumb Member
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Galant VR-4 org Post #: 1137546 posted 08/23/13 11:43 AM     Remind Me!  Send Private Message   Edit Post      
if you didnt get IC105 repaired thats why it isnt starting.

is it repaired?



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152/1000

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IncorpoRatedX
I'm an idiot...
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Galant VR-4 org Post #: 1137547 posted 08/23/13 11:47 AM     Remind Me!  Send Private Message   Edit Post      
sounds like a dead ecu to me. Connect a logger to it and see if it does anything. If you dont get any CEL the bulb is either burned out or the ECU is dead. You'll have power to the ECU pins as you should, and the MPI relay will respond to key positions, but the ECU wont do anything if it's toast.



-Joshua Adventure Driven Design
1991 Galant VR-4
1999 Montero "Goldi-Locker"

Posts: 5593 | From: Arizona | Member Since: 05/28/03 | IP: (24.11.254.179) | Report this post to a Moderator

mcbride89
Member


Galant VR-4 org Post #: 1137628 posted 08/23/13 09:21 PM     Remind Me!  Send Private Message   Edit Post   
Well I thought I had the clutch switch grounded but I unplugged it just to check. And wallah I got it to start.. I went to check and had power at 102 and a heartbeat at 1... I don't get it. I may have a loose wire. Regardless that ecu needs to go. I did have it running a few times today for maybe no more then a minute to check for leaks.

So far no leaks on the return line or new pass. Axle seal.. Crossing my fingers tomorrow

Thanks guys



1991 125/2000

Posts: 133 | From: Belmar,NJ | Member Since: 12/17/12 | IP: (174.44.162.208) | Report this post to a Moderator


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